Packing device for drill-rods or the like.



APPLICATION FILED 00T. 11, 1902.

FO MODEL.

w/TNESSES.'

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UNITED STATES nMFJENT FFICF..

BERT SELFRIDGE, OFfBUTTE, MONTANA.

PACKING DEVICE FOR DRILL-RODS OR THE LIKE.

SIECIFIGATION forming part of Letters Patent No. 723,740, datedy March 24, 1903.

i Application sled umbau, 1902. semina 125,943, (No man.)

To @ZZ whom it mayconcern/f Be it known thatI, BERT SELFR1DGE,a citi-l Zen of the UnitedStates, and a. resident of Butte, in the county of Silverbow and State of Montana, have invented certain 'new andj useful Improvements in Packing Devices for Drill-Rods or the Like, of which the follow-` the Ingersoll-Sergeant machines, in which the pistons, the piston-rod, and the drill-chuck are integral. A

My invention consists of 'the novel features hereinafter claimed.

Reference is lo be had to the accompanying drawings, forming a part of this speciiication, in which similar characters of reference indicate corresponding parts in all the figures.

Figure l is a side elevation, parl-ly in section, showing my improvements applied. Fig. 2 is a similar view showing my improvements in a slightly-dierent form. Fig. 3 shows in side elevation andin plan a bonnet employed in carrying out my improvements when constructed as shown in Fig. 1. Fig. 4 is a plan view of a yoke employed in Vconnection with said bonnet. Fig. 5 shows in plan and side elevation my improved split sleeve to form a guide for the piston-rod. Fig. 6 shows in plan and in elevation a split gland employed in carrying out my inven- Lion, and Fig. 7 shows in plan and side elevation a bonnet of the form employed in the arrangement shown in Fig. 2.

It is the custom in drilling-machines such as the Rand and Ingersoll-Sergeant to form the pistons A, piston-rodB, and drill-chuck C integrally, and this fact dictated the ldetails employed inthe practical embodiment of my improvements.

Referring more particularly to the construction shown in Figs. l, 3, 4, 5, and 6, a longitudinally-split bonnet D is provided, having its inner end d reduced to project partly into the cylinder E of the drilling-machine, the shoulders d at the base of said reduced end d coming to a bearing against the particularly described andv end 0f the Said cylinder. Within the benne D is a longitudinally-split sleeve F, having Ian external annularl flange f, fitting a corresponding groove cl2 in the bonnet D, whereby said sleeve will embrace and guide the piston-rod B. It will be observed that the piston-rod is of less diameter than the pistons A and chuck C. Hence the/split ,form of the bonnet D and sleeve F. AyokeGsurrounds the bonnet D by a taper fit, the opposed surfaces clsg being oppositely tapered, as shown, and said yoke has opposite ears g', through which pass the bolts H, having nuts h for drawing the yoke G to place. The bolts H pass also through the ears or lugs o; on the adjacent end of the cylinder E and are of sut'- cient length in practice to secure the rear cylinder head. (Not shown.) The outer end of the bonnet D has a stuffing-box comprising a longitudinally-split gland I, a nut J, and check-nut K, the said gland being spaced from the splitsleeve F and theinterven-ing space having packing L, surrounding. the piston-rod. The nuts J K have engagement with exterior threads d4 on the bonnet D, and the outer end of the nut J has an internal annular ange lc, that bears against a shoulder t' on the gland I to draw said gland to place. The yoke G and the nuts J Kare large enough to slip over the pistons A A when my improvements are to be applied to or removed from the machine, while the sleeve F, bonnet D, and gland I are of less internal diameter, but being split longitudinally may be separated laterally when being applied or removed.

The only parts of my improvement subjected to wear are the sleeve F and gland I, and they may be renewed at small cost and with a minimum loss of time and labor. Thus the guiding and packing devices may be maintained in perfect condition, which is veryimportant, owing-to the high pressure at which compressed air is employed in the operation of. drilling-machines.

The arrangement shown in Figs. 2 and 7 is Very similar to that already described, the only dierence being that the yoke G is omitted, the bonnet D being formed with integral lugs D2 for receiving directly the securing-bolts H and nuts h and with mating lugs d5 cls on the halves of the bonnet for receiv- IOC ing the bolts D3, that clamp said halves together around the split sleeve F.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The herein-described devices for guiding and packing the rod of a drilling or other machine, comprising a bonnet attachable to the cylinder of the machine, a longitudinallysplit sleeve in said bonnet for guiding the rod, and a stuffing-box on the bonnet, said stuffing-box including a longitudinally-split gland.

2. The combination with the cylinder and piston-rod of a drilling or other machine, of an attachment comprising a bonnet, a sleeve in the bonnet forming a guide for the said piston-rod, and a stuffing-box on the bonnet, said stuffing-box including a gland, the inner end of tho gland being spaced from the outer end of the sleeve thereby forming a longitudinal space for packing between the said sleeve and gland.

3. The herein-described devices for guiding and packing the piston-rod of a drillingmachine, comprising a longitudinally-split bonnet, means for attaching the bonnet lo the cylinder of the drilling-machine, a longitudinally-split sleeve in the bonnet and forming along its length a surface to closely embrace the piston, and a stufiing-box on the bonnet, said stnng-box having alongitudinally-split gland,the inner end of the b011- net being spaced from the outer end of the sleeve to receive packing between them.

4. The herein-described devices for guiding and packing the piston-rod of a drillingmachine, comprising a longitudinally-split bonnet, means for attaching the bonnet to the cylinder of the drilling-machine, a longitudinally-split sleeve in the bonnet, and a stufng-box on the bonnet, said stuffing-box having a longitudinally-split gland, the said split sleeve having an external an nular iian ge, and the said bonnet having a corresponding groove receiving said ilange.

5. The herein-described devices for guiding and packing the piston-rod of a drillinglnachine, comprising a longitudinally-split bonnet, a yoke encircling the bonnet and adapted for engagement by rods on the cylinder of the machine, a longitudinally-split sleeve in the bonnet, and a stuffing-box on the bonnet, the gland of the stufting-box being split longitudinally.

6. The herein-described devices for guiding and packing the piston-rod of a drillingmachine, comprising a longitudinally-split bonnet, a yoke encirclingl the bonnet and adapted for engagement by rods on the cylinder of the machine, the said yoke having a tapered fit on the bonnet, a longitudinallysplit sleeve in the bonnet, and a stuffing-box on the bonnet, the gland of the stuffing-box being split longitudinally.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

BERT SELFRIDGE.

Witnesses:

GEO. B. COOK, E. DVOWNING. 

